How to Prepare for the USACO?

To prepare for the USA Computing Olympiad (USACO), you should have a good grasp of programming and problem-solving concepts. Begin with learning a programming language such as C++, Java, or Python, and familiarize yourself with simple algorithms and data structures such as arrays, loops, functions, sorting, and recursion. After being comfortable with that, begin to solve problems from the USACO training pages and previous contests, starting with the Bronze division. As you progress, learn more advanced stuff such as greedy algorithms, binary search, dynamic programming, and graph theory for upper divisions.